Princeton's WordNet

1. drowsy, drowsing(a), dozy(adj)

   half asleep

   "made drowsy by the long ride"; "it seemed a pity to disturb the drowsing (or dozing) professor"; "a tired dozy child"; "the nodding (or napping) grandmother in her rocking chair"

2. drowsy, oscitant, yawning(a)(adj)

   showing lack of attention or boredom

   "the yawning congregation"

Kernerman English Learner's Dictionary

1. drowsy(adjective)ˈdraʊ zi

   having difficulty staying awake

   I felt drowsy during the day.; medications that cause drowsiness

Wiktionary

1. drowsy(Adjective)

   Inclined to drowse; heavy with sleepiness; lethargic; dozy.

   I was feeling drowsy and so decided to make a cup of coffee to try to wake myself up.

2. drowsy(Adjective)

   Disposing to sleep; lulling; soporific.

   It was a warm, drowsy summer afternoon.

3. drowsy(Adjective)

   Dull; stupid.

Origin: Probably from or akin to drusian.

Webster Dictionary

1. Drowsy(u)

   inclined to drowse; heavy with sleepiness; lethargic; dozy

2. Drowsy(u)

   disposing to sleep; lulling; soporific

3. Drowsy(u)

   dull; stupid

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